Resumo O objetivo deste estudo é identificar a prevalência de ansiedade em profissionais de saúde durante a pandemia da COVID-19. Trata-se de revisão sistemática de estudos publicados em qualquer idioma em 2020. Foi realizada busca nas bases de dados Embase, LILACS e PubMed utilizando os descritores anxiety, COVID-19, health workers, e sinônimos. A estimativa da prevalência geral de ansiedade com intervalo de confiança de 95% foi calculada utilizando o modelo de efeitos aleatórios. Dos 861 registros identificados, 36 artigos foram incluídos na revisão sistemática e 35 na metanálise. A prevalência geral de ansiedade foi de 35% (IC95%: 29-40). Foi identificado maior risco de ansiedade nas mulheres em relação aos homens (Odds Ratio: 1.64 [IC95%: 1,47-1,84]), e nos enfermeiros, na comparação com médicos (Odds Ratio: 1.19 [IC95%: 1,07-1,33]). Atuar na linha de frente no combate a COVID-19, estar infectado com coronavírus e apresentar doenças crônicas também foram fatores associados com maior risco de ansiedade. Observa-se alta prevalência de ansiedade entre profissionais de saúde, com maior risco entre mulheres e enfermeiros. Há necessidade de medidas que visem sua prevenção, bem como o fornecimento de tratamento precoce e adequado aos com ansiedade moderada e grave.

Objective:The incidence rate of major depression in adolescents reaches approximately 14%. This disorder is usually recurrent, without remission of symptoms even after pharmacological treatment, and persists throughout adult life. Since the effects of antidepressants take approximately 2 weeks to begin, new pharmacological therapies are under continuous exploration. Recent evidence suggests that psychedelics could produce rapid antidepressant effects. In this study, we evaluated the potential antidepressant effects of ayahuasca in a juvenile non-human primate model of depression.Methods:While living with their families, juvenile marmosets (8 males; 7 females) were observed on alternate days for four weeks during a baseline phase. This was followed by 8 weeks of an induced depressive state protocol, the social isolated context (IC), in which the animals were monitored in the first and last weeks. Subsequently, five males and four females were randomly selected for treatment, first with a single administration of saline vehicle (1.67 mL/300 g of body weight, via gavage), followed by a single dose of ayahuasca (1.67 mL/300 g of body weight, via gavage). Both phases lasted 1 week and the animals were monitored daily. A third week of sampling was called the tardive-pharmacological effects phase. In all phases the marmosets were assessed for behavior, fecal cortisol levels, and body weight.Results:After IC, the animals presented typical hypocortisolemia, but cortisol recovered to baseline levels 24 h after an acute dose of ayahuasca; this recovery was not observed in vehicle-treated animals. Additionally, in males, ayahuasca, but not the vehicle, reduced scratching, a stereotypic behavior, and increased feeding. Ayahuasca treatment also improved body weight to baseline levels in both sexes. The ayahuasca-induced behavioral response had long-term effects (14 days). Thus, in this translational juvenile animal model of depression, ayahuasca presented beneficial effects.Conclusions:These results can contribute to the validation of ayahuasca as an antidepressant drug and encourage new studies on psychedelic drugs as a tool for treating mood disorders, including for adolescents with early-onset depression.

No abstract

Anxiety behavior in female Wistar rats was assessed at different stages of the estrous cycle using the elevated plus maze (EPM). No differences were observed at any cycle stage. Pretreatment with diazepam (1 mg kg(-1) intraperitoneal (i.p.)) 30 min before testing produced an anxiolytic effect (significant increase in percentage of time in the open arms compared to control group in the same cycle phase) in animals in proestrus, estrus, and early diestrus but had no effect in rats in late diestrus. Locomotor activity (total arm entries) was unchanged at any cycle phase. When rats in the late diestrus phase were pretreated with the selective serotonin reuptake inhibitor fluoxetine (1.75 mg kg(-1) i.p. on the afternoon of early diestrus and again in the morning of late diestrus) diazepam produced an anxiolytic effect (increase percentage time in the open arms). This dose is sufficient to raise brain allopregnanolone concentration without affecting 5-hydroxytryptamine (5-HT) systems. We propose that insensitivity to diazepam in late diestrus is due to increased expression of benzodiazepine insensitive α4 subunit-containing gamma-aminobutyric acid A (GABAA) receptors triggered by a sharp decrease in brain allopregnanolone concentration. Pretreatment with fluoxetine to raise brain allopregnanolone concentration during late diestrus prevents the withdrawal effect.

No abstract